FUD Zilla writes Intel's 32nm Sandy Bridge architecture will use Socket 1155, so a new motherboard will be required for these chips.
The next generation chipset that Intel likes to call 6 series chipset, scheduled for Q1 2011 introduction, will support socket 1155. Intel also said the same for its 5 series of chipset and shortly before the launch it turned out that the real chip has 1156 pins.
Intel wanted to keep it a secret and you can easily imagine that you will need a new motherboard for a Sandy Bridge 32nm new architecture, simply as the new chip will ask for a new chipset.
The quite disappointing part is that the chipset only supports USB 2.0 and it can host up to 14 of them, but for USB 3.0 you will have to add an external chip, this is at least what Intel tells its partners.